Electric vehicle maker NIO saw its shares surge 6.62% on the Hong Kong stock exchange in Thursday's pre-market session, as part of a broader rally in EV stocks.

According to market data, NIO's stock, traded under the ticker 09866, opened at a sharp upswing, with the rise coming amid similarly strong gains for other major EV players. Rival XPeng saw its shares climb 8%, while BYD advanced 5% and Xiaomi edged up 0.5%.

While no specific catalyst was cited for the upswing, the simultaneous uptick across EV manufacturers points to positive investor sentiment around the sector. NIO, in particular, has seen growing momentum following its expansion into European markets and plans to establish a manufacturing base overseas.